Key Features:

Precision 4.49mm Head Sizing

The 4.49mm sizing is specifically designed for high-performance match barrels that require a tighter, more customized fit. This precision tolerance reduces air bypass within the barrel, ensuring a more consistent muzzle velocity and a perfectly engaged rifling for stable flight.

Heavy-Weight 8.26-Grain Profile

Weighing approximately 0.535 grams (8.26 grains), the S100 Heavy is slightly weightier than standard training pellets. This added mass provides a more stable, predictable trajectory, making them exceptionally reliable for 10m precision shooting where every fraction of a millimeter counts.

Match-Grade Manufacturing & Quality Control

JSB is legendary for its meticulous quality control. Each S100 Heavy pellet is checked for uniform weight distribution and perfectly centered skirts. This level of craftsmanship eliminates “flyers,” ensuring that your groupings accurately represent your technical performance on the range.

Crisp, Clean Scoring Holes

The classic wadcutter (flat-head) design is optimized to punch sharp, perfectly circular holes in paper targets. This makes visual evaluation through a spotting scope or scoring via electronic sensors significantly more precise, allowing for clear analysis of your shot strings.

Elite Performance Comparison

Considered a direct equivalent to the prestigious RWS R10 Rifle and QYS Training pellets, the JSB Blue Match S100 offers elite-level performance. It is a world-class alternative for athletes looking to test different ammunition types to find the perfect match for their specific rifle barrel.

Specifications

• Brand: JSB Match Diabolo (Czech Republic)
• Caliber: .177 Cal (4.5 mm)
• Head Size: 4.49 mm
• Weight: ~8.26 grains (0.535 g)
• Type: Wadcutter / Flat Head (Heavy Weight)
• Quantity: 500 Pellets per tin
• Recommended Use: State-level training, Match preparation, 10m Target Shooting
• Category: Air Pellets / Rifle Pellets

Technical Details & Usage Tips

• Barrel Care: To maintain the high-precision results of JSB pellets, we recommend cleaning your rifle barrel after every 100–150 shots to prevent lead buildup and maintain consistent friction.
• Size Testing: While 4.49mm is a standard for many precision barrels, it is always beneficial to test both the 4.49mm and 4.50mm variants to see which head size provides the tightest group for your specific rifle.
• Match Strategy: Use the S100 Heavy for your most intense training sessions and pre-match prep to mirror the weight and feel of top-tier competition ammunition.
• Handling: Always handle pellets by the head. Avoid squeezing or damaging the thin-walled skirts, as even micro-deformations can lead to erratic shots during a match.